Staking-machine



(.No Model.)

. 2 Sheets-Sheet 1.V vD. H. CHURCH.

I l STAKING MACHINE. No. 553,221.

Patented Jan. 14

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V 2 Sheets- Sheet A2.

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UNiTnn STATES DUANE i1I. CHURCH, OF NEVTON, MASSACHUSETTS;

STAKING'VIACHINE.

SPECIFICATION forming part of Letters Patent No. 553,221, dated January14, 1896.

"Application led July Z0, 1895. Serial No. 556,559. (No model.)

To all whom it may concern:

Be it known that I, DUANE H. CHURCH, of Newton, in the county ofMiddlesex and State of Massachusetts, have invented certain new anduseful Improvements inQStaking-Machines,of which the following is aspecification.

This invention has for its object to provide an improvedstaking-machine, so called, adapted to secure watch-movement wheels topinion-staffs; and it consists in the improvements which I will nowproceed to describe and claim., reference being had to the accompanyingdrawings, of which- Figure 1 represents a front elevatibn of astaking-machine embodying my improvements. Fig. 2 represents a sideelevation of Fig. 3 represents a vertical transverse section on the line33, Fig. 1. Fig. 4 represents a section on line 4 4, Fig. i Fig. 5represents a section on line 5 5, Fig. l. Fig. G represents a section online G 6, Fig. 3. Figs. 7, 8, and 9 represent enlarged sectional viewsof the portions of the machine which perform diversely on the work,different relative positions assumed being shown in diierent views. Fig.lOl shows an enlarged section of parts appearing in Fig. 3 betweendotted lines 7 7.

The same letters of reference indicate the same parts in all the gures.

In the drawings, a designates a stationary cylinder provided withpistons Z) c'which are normally held central of `the cylinder by springsCZ e, the spring d being 'somewhat lighter than the spring e, for apurpose hereinafter explained;

To the upper piston b is suitably secured a sleeve or hollow rod fextending .through the cylinder and engaging the end of a lever gpivoted at h to a standard i formed upon the cylinder-head k. Theouter-end of said' lever g engages -a plunger Z fitted to movelongitudii nallyin a sleeve m secured to the cylinder; i

'i into the sleeve or rodf,`ftl1elarrangement be-` The lower `piston ois securedto'arod-f'a having an enlarged portion o upon'whichthe underside 'of said `piston `rests, while fthe smaller portion of therodextends upwardly ing such that the pistons are centrallyguided in the'cylinder and `prevented -from binding therein.' f" .'H

The lower end o of piston-rod n rests upon an arm 2J pivoted at p4 yto ablock q. (See Fig. 0.) Said block is adjustably secured in a recess o'formed in a downwardlyprojecting portion of the cylinder. A screw sengages the upper portion t of the block q and is operated by ahand-wheel afto adjust .the arm p for a purpose pointed out hereinafter.The free end of the arm prests upon a lever fr pivoted at w to astandardfy formed` upon the under side of the cylinder. The outer end ofsaid lever bears upon a plunger a incased in a'sleeveV b and is `adaptedto be moved longitudinally by saidlever 2:,which is so arranged as to bemoved independently ofthe piston c by the operator through a rod cattached thereto and a treadle d' attached to the rod c. j y

` The pistons are moved in the cylinder preferably by meansofcompressed4 air which enters the cylinder from a supply-pipe e througha passage or port f formed in the cylindershell, the opening of saidpassage being midway of the pistons, Fig. Il, so that the pistons may bemoved in opposite directions to operate the levers u g and theiradjunct-s.

The entranceof the air to the cylinder is controlled by f'valve g' ofany suitable construction. The one `here shown is pistonshaped andiitted to slide in a bushing h, secured in a projection i", formed onthe cylinder a. Said valve is provided with a passage j' and has arecess k' formed in one end, `and scribed, in which-thefeinhaust-openi'ng Z' reg` isters witlrtle passage' f ,f being held`'in said positionbyaspringmi, one en'd of whichbears upon a bracket n:attachedA to the lunder yside.

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ofthe .eylinde'riagqwhile thezother end bears against aco'llai"o-fseeure'd `to a rod p', whichrod issecured tothe' valve g-at one end,the i l, other end passing througlr the bracketfa andA having a knob orpull q' attached thereto.

-yielding pressure is applied, the purposeof `nient for the latter andholding it in position (See Fig. 2.) A

The lever g engages at its outer end with a` cap r fitted upon theplunger Z, which has an enlarged portion s closely iitting the sleeve mand adapted to slide therein. The lower portion t of the plunger isreduced in diameterv and is surrounded by a sleeve u, the upper end ofwhich bears against a spring o', Fig. l0, the upper end of which restsagainst a collar w loosely surrounding the reduced por-. tion of theplunger Z, thlsleeve being heldinv position vertically by a pin e',secured to the plunger Z, and projecting through'a slot a2 in the sleevem, as will be more clearly understood by reference to Fig. 10. "A springb2 has one end bearing against the enlarged portion s' of the plunger land the other resting upon a sleeve c2, the lower end of which bea rsupon a head d2 secured to the sleeve u', the arrangement being such thatwhen the plunll ger is operated downwardly a dierential which will beexplained later in the operation. The plunger Z is bored to receive aset or staker e2, preferably formed in sections to prevent binding orspringing in the bore, as would bethe case were one piece used. 'Theupper end of the bore is screw-threaded and a screw f2 inserted therein,the lower end of whichv bears against the upper end of the staker or.set e2, providing means of adjustagainst presspre.

The arm p' is adjustable upon the lever v in the direction of its lengthby means of the screw s and block q, so that the degree of pressureexerted by the piston -c upon said lever maybe varied to suit diferentclasses of work; and to accurately adjust the leverage I have providedan indicator h2, Which is attached to the vsliding block q, as shown einFig. (i, the outer end registering with 'a scale i? upon the outside ofthe machine. 4

'An adj usting-screwj2 is also shown to limit the downward movement oflever 3;, and theA latter at its outer or shorterend bears against a cap7a2, the upper portion of which has a socket which receives the lowerend of plunger e', adapted to move vertically in a bushing Z2, fitted tothe lower portion of socket b.

The upper portion of said plunger is reduced '1n diameter and issurrounded by a spiral spring m2, the lower end of which bears again stthe enlarged portion of the plunger, and the upper end bears against theupper end of the socket. The object of said spi-ing is to normallysustain' the lever u and arm j) in contact with the lower end of the rodo by means .0f pressure exerted upon the plunger c', as will be readilyunderstood by reference to Fig. The plunger c' is also provided witha-set n2 in the same manner as the plunger s', the upper end o2 ofwhich. projects above said plunger, Fig. 3, which is surrounded by abushing o3, to which bushing is iitted'a cap o4. li avin g a centralopening o15 corresponding to the conical end of the set o2. Said cap isalso tted with a depression or counterbore o5 to receive 'a wheel o6 ofa Watch for the purpose of inserting the. staff into the same.

The ends of the sets are provided with sockets o9 010 for thereceptionof the staff of the pinion o8 during the operation.

Operation: The operator depresses the treadle and draws down the longerend of the lever fe, which raises theshorter end of said lever and withit the plunger a until the conical 'end of the set engages the openingo15 in the cap ci, aS-Show'mn.- Fig. 7. .A pinion o8 is placed thereon,and on pressure from the treadle being removed the plunger resumes itsnormal position, as shown in Fig. 8, withl the pinion resting thereon. Awheel o6 is th en -placed upon the cap o4, and air is admitted into thecylinder by the operation of the valve already described, and the pistonb is moved upwardly, which movement, through the lever g, depresses theplunger Z until the head.

Z2 rests upon the wheel, as shownin the lastmentioned figure. During themovement of piston b the piston c has remained inopera- `pleted, asbefore explained, with the result shown in Fig. 8, the movement ofpiston cnow takes place in a downward direction, depressing arm p andlever o, thereby raising plunger a,'with the pinion resting'the'reon,into the position shown in Fig. 9, in which position the projectingportionrf" of the staff is forced intothe center of the wheel, the headd2 yielding against the pressure of the springs e and b2 to permit theset e? to press directly upon the'stai and upset the same within theWheel.

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Vhat -I claim as my invention is as follows 1. In a machinelof thecharacter described, the combination of opposed plungers; mechanisms foradvancing the same toward each other, said mechanisms actuated by anagent common to both; and restraining means, that applied to one of saidlnechanisms being inferior to that applied to the other, whereby oneplunger is caused to advance before the other, although impelled by. thesame agent.

2. In a machine of the character described, the combination of opposedplungei's, a cylinder, a pair of pistons therein, means for admittingfiuid under. pressure between said pistons, and movement-reversingconnections between 'the pistons and plungers respectively, wherebymovement of the pistons away from each other advances the plunger-stoward eachother, the pluugers moving in an opposite direction to theirrespective pistons, substantially as described.

3. In a machine of the character described, the combination of acylinder, a pair of pistons therein, means for admitting fluid underpressure between said pistons, springs resisting movement of saidpistons by4 the iiuid IIO the combination of a cylinder, a pair of pis-.

to'ns in said cylinder, springs holding said pistons Ain the middle ofthe cylinder, `the spring applied to' one piston being stronger thanthat applied to the other, opposed plungers for acting on the work,andsuitable connections between the plungers and the pistons.

`5. In a machine of the character described, the combination of opposedplungers to act on the work; and mechanism to advance the said plungersrespectively and both actuated by a common agent, one ot' saidmechanisms including a disconnected lever 4which while serving totransmit power from the said common agent to one plunger may beindependently operated-to advance that plunger',- substantially asdescribed.

G. In a machine of the character described,

the combination of a plunger for supporting the work, a lever engagedwith said plunger,l

a second lever engaged With but disconnected from said rst lever andpivoted to a movable u support, means for adjusting said support to varythe point of engagement of the two 1evers, and means applied to thesecond lever for impelling it against the irst lever and therebyoperating the plunger and a cooperating plunger and its actuatingmechanism.

7. In a machine of the character described, the combination of an upperplunger, ahead surrounding the same, a yielding connection between saidheadand plunger, a lower plunger, an anvil with provision for receivingthe latter, and means for actuating the plungers, with provisions formovement of the upper plunger with its surrounding head in advance ofthe lower plunger, for the purpose de scribed.

In testimony whereof I vhave signed my name to this specification, inthe presence of two subscribing witnesses, this 5th day of July, A. D.1895.

DITANE ll. CHURCH.

Witnesses:

A..D. HARRISON, W. P. AnELL.

